brcmsmac: Further reduce log spam from tx phy messages

Relegate 2 phy messages to debug status as they create excessive
log spam, noted in multiple bugzillas for brcmsmac v3.8 and up.
This is a follow on to net-next 99e94940:
brcmsmac: Reduce log spam in heavy tx, make err print in debug

 brcmsmac bcma0:0: phyerr 0x10, rate 0x14
 brcmsmac bcma0:0: brcms_c_ampdu_dotxstatus_complete:
ampdu tx phy error (0x10)
Signed-off-by: John Greene <jogreene@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmsmac/ampdu.c

@@ -928,7 +928,7 @@ brcms_c_ampdu_dotxstatus_complete(struct ampdu_info *ampdu, struct scb *scb,
 			}
 		} else if (txs->phyerr) {
 			update_rate = false;
-			brcms_err(wlc->hw->d11core,
+			brcms_dbg_ht(wlc->hw->d11core,
 				     "%s: ampdu tx phy error (0x%x)\n",
 				     __func__, txs->phyerr);
 		}

drivers/net/wireless/brcm80211/brcmsmac/main.c

@@ -882,7 +882,7 @@ brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs)
 	mcl = le16_to_cpu(txh->MacTxControlLow);
 
 	if (txs->phyerr)
-		brcms_err(wlc->hw->d11core, "phyerr 0x%x, rate 0x%x\n",
+		brcms_dbg_tx(wlc->hw->d11core, "phyerr 0x%x, rate 0x%x\n",
 			     txs->phyerr, txh->MainRates);
 
 	if (txs->frameid != le16_to_cpu(txh->TxFrameID)) {